22156902 has 40 divisors (see below), whose sum is σ = 49945896. Its totient is φ = 7341408.

The previous prime is 22156879. The next prime is 22156913. The reversal of 22156902 is 20965122.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37453 + ... + 38039.

Almost surely, 2^22156902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22156902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24972948).

22156902 is an abundant number, since it is smaller than the sum of its proper divisors (27788994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22156902 is a wasteful number, since it uses less digits than its factorization.

22156902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 22156902 is about 4707.1118533555. Note that the first 3 decimals coincide. The cubic root of 22156902 is about 280.8684853774.

The spelling of 22156902 in words is "twenty-two million, one hundred fifty-six thousand, nine hundred two".